Does anyone know a website where you can dwnld Super Mar. Bros and play w. a controller hooked up to the comp?

The super mario bros game online is on a couple of websites, where its possible to download the game, plug in a controller, and play. All the sites ive found only allow you to play with the keys on your computer. I used to know the website and now i have no idea. Some please help me out, its something with Old School in it when you type it in to search. So Super Mario Bros, Super Mario 3, anything like that, but where you can plug up a controller. Please help me out.|||ConsoleClassix.com|||I have emulators for all that good stuff, email me if you want me to send it to you, no viruses!|||I suggest Googling it,lol it works.|||idk